Scoop Upworthy
By Pheba Mathai
March 25, 2024
The Koala Peninsula, deep in the Arctic Circle, has lakes, forests and snow, yet amidst the natural beauty there is an abandoned Soviet scientific research station. In the middle of that building is a heavy, rusty metal cap that is on the concrete floor, secured with rusty metal bolts and some call it an entrance to hell, per BBC. This is the deepest artificially dug hole on Earth is Koala Superdeep Borehole SG-3 which was drilled at 12.262 km (7.61 miles) in 1989.